Edgab buell



ATTORNYS.

'E. BUELL.

BIT STOCK.

Patented Dec. 4, 1883.

(N0 Model.)

UNITED STATES PATENT OFFICE.

EDGAR BUELL, OF CLINTON, CONNECTICUT, ASSIGNOR TO HIMSELF AND ANDREW L. BUELL, OF SAME PLACE.

BIT-STOCK.

SPECIFICATION forming part of Letters Patent No. 289,502, dated December 4, 1883.

Application filed October 11, 1883. (No model.)

To all whom it may concern.-

Be it known that LEDGAR BUELL, of Clinton, in the county of Middlesex and State of Connecticut, have invented certain new and useful Improvements in Bit-Stocks, of which the following is a specification.

This invention has reference to an improved construction of bit-stock of that class into which tools of different kinds and sizes can be quickly and firmly inserted for use; and the invention consists of an exterior tapering sleeve to the upper end of which an elbow lever is fulcrumed. The shorter arm of the elbow-lever is connected by forked and intermediate hpivot-links, to the upper ends of two tapering clamping-j aws, that are suspended in the interior of the sleeve, and applied to or released by the action of the elbow-lever from the tapering shank of the tool.

In the accompanying drawings, Figure 1 represents a brace with my improved bit-.

stock. Figs. 2 and 3 represent vertical axial sections of the same, taken, respectively, on. lines w w and y y, Fig. 4.; and Fig. 4 is ahoriz'ontal section on line 2 2, Fig. 2.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents a tapering sleeve, the lower part of which is made of square cross-section at its inside. The sleeve A is attached at its upper part to a brace or auger handle. At the upper part of the sleeve A are arranged lugs A, which are integral with the sleeve, and provided with inwardlyprojecting screws on a, the inner ends of which form the fulcrum for the forked end of an elbow-lever, B. To the end of the shorter forked arm of the elbow-lever B is pivoted a connecting -rod, B, the lower end of which is forked and pivoted to short links I) b. The lower ends of said links I) b are pivoted to the upper ends of two clamping-jaws, C, which are arranged in the slightly-tapering interior space of the sleeve A. The jaws C are made of slightly-tapering steel strips of rectangular cross-section, and are adapted to fit on the tapering butt ends of the shanks of the tools used in connection with the stock.

In operating my improved bit-stock, the elbow-lever Bis placed in the position shown in dotted lines in Fig 2, whereby the connecting-rod B, the links I) b, and the jaws C are lowered. The tapering butt-end of an auger or other tool is then inserted between the jaws, and the elbow-lever returned to its former positi on ,whereby the tool is drawn up with the jaws into the sleeve, and rigidly clamped thereby in a rapid and reliable manner. When the tool is to be removed from the bit-stock, the lever is moved on its fulcrum through an angle of one hundred eighty degrees,whereby the jaws are released from the butt-end of the tool. As the pivot of the shorter arm of the elbow-lever and of the connecting-rod passes to one side of the vertical line drawn through the fulcrum of the elbow-lever, the latter is rigidly locked in position. The jaws can only be released from the tool-shank when the lever is lifted so that the connecting rod is moved over the center line of its fulcrum.

Having thus described my invention, I claim as new and desire to secure by Letters Patent The combination of an exterior tapering sleeve, interior tapering jaws, intermediate connecting-links, and an elbow-lever that is fulcrumed to the upper end of the sleeve and pivoted to the intermediate links, so as to open the jaws or close them onto the tapering shank end of the tool, substantially as set forth.

In testimony thatI claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

EDGAR BUELL.

I Witnesses:

PAUL GoEPEL, SIDNEY MANN. 

